PA-03 ChipAmp 600watts

sivan_and · 13th December 2004, 10:49 PM

Hello all !! New to this forum...GREETINGS from Kozhikode India.
I am planning to build a high power Amplifier using PA03 chip Package is TO3-8pin made by Apex technology, since i have a dozen of these. From the data sheet its possible to achieve 300watts/8ohms @75volts dual supply, or 600watts 4ohms @75volts dual supply.i have most of the parts and will be designing PCB shortly.
Any comments and suggestions welcome, will be posting the progress thru pictures...

Stocker · 14th December 2004, 01:32 AM

I for one will be following this thread with interest...please do keep it up to date!

sivan_and · 15th December 2004, 09:06 AM

Day two the Chips........

sivan_and · 17th December 2004, 05:45 AM

The schematic...600 watts/4 ohms.
The input has a slew rate limiter R7 and C5, both values will be modified (reduced) in testing to allow better response/ High frequency distortsion.

Rudy · 17th December 2004, 08:26 AM

Try reversing C2

it saves you a big bang

Rudy

sivan_and · 17th December 2004, 08:35 AM

sivan_and · 14th January 2005, 07:06 AM

Test process continuing.....since last week...Running a load of 4 Ohms heater nichrome wire with a PSU of 120Volts total, Stability OK regard to DC offset..10mV>>> 22mV after 2 days stable now..
Temp on TO3 case 75deg cent....

Upupa Epops · 14th January 2005, 07:41 AM

OP 37, unity gain stable ?

arasuk · 14th January 2005, 06:00 PM

Hi Sivanand!!

Where are these PA03 Opamps Available here in india, I am interested in this amp!!

let me know if these are available and hows the performance of these chips.

Thanks

Arasuk

sivan_and · 15th January 2005, 02:37 AM

Got it from a friend in USA.
No idea abt the availability in India.Costs will be exorbitant,i'm sure....

13th December 2004, 10:49 PM	#1
sivan_and diyAudio Member Join Date: Dec 2004 Location: Dxb / India	PA-03 ChipAmp 600watts Hello all !! New to this forum...GREETINGS from Kozhikode India. I am planning to build a high power Amplifier using PA03 chip Package is TO3-8pin made by Apex technology, since i have a dozen of these. From the data sheet its possible to achieve 300watts/8ohms @75volts dual supply, or 600watts 4ohms @75volts dual supply.i have most of the parts and will be designing PCB shortly. Any comments and suggestions welcome, will be posting the progress thru pictures... __________________ SivanandBalan

14th December 2004, 01:32 AM	#2
Stocker diyAudio Member Join Date: Dec 2003 Location: Austin	I for one will be following this thread with interest...please do keep it up to date! __________________ Jesus loves you.

17th December 2004, 08:35 AM	#6
sivan_and diyAudio Member Join Date: Dec 2004 Location: Dxb / India	__________________ SivanandBalan

14th January 2005, 07:06 AM	#7
sivan_and diyAudio Member Join Date: Dec 2004 Location: Dxb / India	Test process continuing.....since last week...Running a load of 4 Ohms heater nichrome wire with a PSU of 120Volts total, Stability OK regard to DC offset..10mV>>> 22mV after 2 days stable now.. Temp on TO3 case 75deg cent.... __________________ SivanandBalan

14th January 2005, 06:00 PM	#9
arasuk diyAudio Member Join Date: Dec 2003 Location: bangalore	pa03!! Hi Sivanand!! Where are these PA03 Opamps Available here in india, I am interested in this amp!! let me know if these are available and hows the performance of these chips. Thanks Arasuk __________________ thanks a many for the diy audio for its existence.


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17th December 2004, 08:26 AM	#5
Rudy diyAudio Member Join Date: Feb 2003 Location: Belgium	Try reversing C2 it saves you a big bang Rudy

14th January 2005, 07:41 AM	#8
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	OP 37, unity gain stable ?

15th January 2005, 02:37 AM	#10
sivan_and diyAudio Member Join Date: Dec 2004 Location: Dxb / India	Got it from a friend in USA. No idea abt the availability in India.Costs will be exorbitant,i'm sure.... __________________ SivanandBalan

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